My girlfriend and me stayed 3 nights at Evan's Homestay. The room was pretty good, had a/c, a fridge, big bed and prepared towels. Location was ideal as well with a good airport and train station connection. Cabs into town cost about 100-150 baht (2-3£). Evan was a helpful host, always there and recommended us some things to do in bangkok. We also loved his dogs :)
The only downside was the toilet/bathroom. It wasn't located on the same floor we stayed and the shower was really low pressure.
All in all, we had a good time and would stay again.